Question

我试图在2位用户之间建立友谊，而我正在使用tutorial

我将此作为我的friendships_controller.rb，

def create
  @friendship = current_user.friendships.build(:friend_id => params[:friend_id])
  if @friendship.save
    flash[:notice] = "Added friend."
    redirect_to root_url
  else
    flash[:error] = "Unable to add friend."
    redirect_to root_url
  end
end

在Angular中我有这个功能，

$scope.addFriend = function (user) {
  $scope.user = user
  console.log ($scope.user)

  createFriend.create({
    friend_id:   $scope.user.id
  })
}

这是我的Angular服务中的创建方法，

app.factory('createFriend', ['$http', function($http) {
  return {
    create: function() {
      return $http.post('/friendships.json');
    }
  };
}])

当我添加一个朋友时，我在我的rails控制台中得到了这个，

Started POST "/friendships.json" for 127.0.0.1 at 2015-12-29 12:51:59 +0100
Processing by FriendshipsController#create as JSON
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ?  ORDER BY "users"."id" ASC LIMIT 1  [["id", 1]]
   (0.1ms)  begin transaction
  SQL (9.9ms)  INSERT INTO "friendships" ("user_id", "created_at", "updated_at") VALUES (?, ?, ?)  [["user_id", 1], ["created_at", "2015-12-29 11:51:59.550777"], ["updated_at", "2015-12-29 11:51:59.550777"]]
   (17.6ms)  commit transaction
Redirected to http://localhost:3000/
Completed 302 Found in 39ms (ActiveRecord: 27.7ms)

从控制台输出中可以看到，friend_id参数丢失。

它已添加到数据库中，

create_table "friendships", force: :cascade do |t|
  t.integer  "user_id"
  t.integer  "friend_id"
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
end

当我在我的rails控制台中运行Friendship.all时，我得到了，

<Friendship id: 1, user_id: 1, friend_id: nil, created_at: "2015-12-29 11:36:46", updated_at: "2015-12-29 11:36:46">

为什么friend_id参数未被使用的任何想法？

Answer 1

您需要将参数从createFriend.create传递到$http.post。如果您查看documentation，$http.post将url作为第一个参数，请求内容作为第二个参数。现在，{friend_id: $scope.user.id}被忽略了。下面的代码（未经测试）应该可以解决问题。

app.factory('createFriend', ['$http', function($http) {
  return {
    create: function(data) {
      return $http.post('/friendships.json', data);
    }
  };
}])

Rails控制器不从Angular控制器

1 个答案: